J/A+A/408/611 V436 Persei UBV photometry (Janik+, 2003)
Search for forced oscillations in binaries.
IV. The eclipsing binary V436 Per revisited.
Janik J., Harmanec P., Lehmann H., Yang S., Bozic H., Ak H., Hadrava P.,
Eenens P., Ruzdjak D., Sudar D., Hubeny I., Linnell A.P.
<Astron. Astrophys. 408, 611 (2003)>
=2003A&A...408..611J 2003A&A...408..611J
ADC_Keywords: Binaries, eclipsing ; Binaries, spectroscopic ; Photometry, UBV
Keywords: stars: binaries: close - stars: binaries: eclipsing -
stars: binaries: spectroscopic - stars: fundamental parameters -
stars: oscillations - stars: individual: V436 Per = 1 Per
Abstract:
An analysis of new spectroscopic and photoelectric UBV observations,
satisfactorily covering the whole orbital period of V436 Per, together
with existing data allowed us to improve the knowledge of the basic
physical characteristics of the binary and its components. In several
aspects, our new results differ from the findings of Paper I (Harmanec
et al., 1997, Cat. J/A+A/319/867) of this series: In particular, we
found that it is the star eclipsed in the secondary minimum which is
slightly more massive and larger than the optical primary. We also
conclude that the apsidal advance -- if present at all -- is much
slower than that estimated in a previous study. The orbital period
might be increasing by 0.28 s per year but also this finding is very
uncertain and needs verification by future observations. It is
encouraging to note that two completely independent sets of programs
for light-curve solutions lead to identical results. A notable finding
is that both binary components rotate with very similar -- if not
identical -- rotational periods of 1.45d and 1.40d, much shorter than
what would correspond to a 10.9d spin-orbit synchronization period at
periastron. Rapid line-profile changes reported earlier could not be
confirmed from new, dedicated series of high-resolution and S/N
spectra.
Objects:
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RA (2000) DE Designation(s)
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01 51 59.3 +55 08 51 V436 Per = 1 Per = HD 11241 = HR 533 = HIP 8704
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 42 2248 V436 Per (Johnson UBV photometry)
refs.dat 85 17 Numerical code identifying sources of data
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See also:
J/A+A/319/867 : V436 Persei = 1 Persei byBV photometry (Harmanec+ 1997)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
17- 22 F6.4 mag mag Measured V436 Per magnitude in color band
28- 31 F4.2 --- w_mag Weight assigned to individual data
36- 37 I2 --- r_mag Numerical code identifying sources of data,
in refs.dat file
42 A1 --- Band [UBV] Johnson UBV color
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Code Source code
4- 26 A23 --- Band Band
28- 44 A17 --- Aut Author's name
45- 63 A19 --- BibCode BibCode
65- 85 A21 --- Com Comments
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Acknowledgements: Petr Harmanec or
Jan Janik ,
References:
Harmanec et al., Paper I 1997A&A...319..867H 1997A&A...319..867H, Cat. J/A+A/319/867
Holmgren et al., Paper II 1997A&A...322..565H 1997A&A...322..565H
Holmgren et al., Paper III 1999A&A...345..855H 1999A&A...345..855H
(End) Patricia Bauer [CDS] 08-Sep-2003